Supplemental Guarantor Information (Level 4 IS) (Details 2) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2020	Apr. 30, 2019
Supplemental Condensed Consolidating Statement of Operations
Revenues	$ 1,549,072	$ 1,716,094	$ 2,880,503	$ 3,079,275
Cost of revenues	1,277,107	1,377,268	2,369,289	2,453,766
Selling, general and administrative	179,417	178,371	371,170	340,609
Income (loss) from operations	92,548	160,455	140,044	284,900
Other [Abstract]
Income (loss) from unconsolidated entities	(4,271)	4,419	7,870	10,559
Other income - net	13,836	11,285	20,131	32,146
Intercompany interest income	0	0	0	0
Interest Expense	0	0	0	0
Income from subsidiaries	0	0	0	0
Income (loss) before income taxes	102,113	176,159	168,045	327,605
Income tax provision	26,443	46,835	35,499	86,231
Net income (loss)	75,670	129,324	132,546	241,374
Other Comprehensive Income (Loss), Net of Tax	278	56	556	112
Comprehensive Income (loss), Net of Tax, Attributable to Parent	75,948	129,380	133,102	241,486
Toll Brothers Inc. [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues	0	0	0	0
Cost of revenues	0	0	0	0
Selling, general and administrative	47	101	100	491
Income (loss) from operations	(47)	(101)	(100)	(491)
Other [Abstract]
Income (loss) from unconsolidated entities
Other income - net
Intercompany interest income
Interest Expense
Income from subsidiaries	102,161	176,260	168,145	328,096
Income (loss) before income taxes	102,114	176,159	168,045	327,605
Income tax provision	26,443	46,835	35,499	86,231
Net income (loss)	75,671	129,324	132,546	241,374
Other Comprehensive Income (Loss), Net of Tax	278	56	556	112
Comprehensive Income (loss), Net of Tax, Attributable to Parent	75,949	129,380	133,102	241,486
Subsidiary Issuer [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues	0	0	0	0
Cost of revenues	0	0	0	0
Selling, general and administrative	11	662	36	1,395
Income (loss) from operations	(11)	(662)	(36)	(1,395)
Other [Abstract]
Income (loss) from unconsolidated entities
Other income - net
Intercompany interest income	29,272	32,883	65,642	67,004
Interest Expense	(29,261)	(32,221)	(65,606)	(65,609)
Income from subsidiaries
Income (loss) before income taxes	0	0	0	0
Income tax provision
Net income (loss)	0	0	0	0
Other Comprehensive Income (Loss), Net of Tax
Comprehensive Income (loss), Net of Tax, Attributable to Parent	0	0	0	0
Guarantor Subsidiaries [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues	1,535,726	1,690,615	2,842,899	2,998,144
Cost of revenues	1,262,433	1,348,732	2,327,993	2,373,765
Selling, general and administrative	187,091	185,133	385,041	355,050
Income (loss) from operations	86,202	156,750	129,865	269,329
Other [Abstract]
Income (loss) from unconsolidated entities	513	3,154	14,715	8,541
Other income - net	9,402	6,758	14,068	12,255
Intercompany interest income	1,425	343	2,930	870
Interest Expense	(1,509)	(1,475)	(2,802)	(2,980)
Income from subsidiaries	12,128	10,730	15,369	40,081
Income (loss) before income taxes	108,161	176,260	174,145	328,096
Income tax provision	27,725	46,859	36,788	86,355
Net income (loss)	80,436	129,401	137,357	241,741
Other Comprehensive Income (Loss), Net of Tax
Comprehensive Income (loss), Net of Tax, Attributable to Parent	80,436	129,401	137,357	241,741
Nonguarantor Subsidiaries [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues	61,329	71,231	127,565	171,658
Cost of revenues	37,534	46,525	82,372	113,766
Selling, general and administrative	16,195	17,342	32,991	36,095
Income (loss) from operations	7,600	7,364	12,202	21,797
Other [Abstract]
Income (loss) from unconsolidated entities	(4,784)	1,265	(6,845)	2,018
Other income - net	9,508	1,019	10,476	14,250
Intercompany interest income	1,509	1,475	2,802	2,980
Interest Expense	(1,705)	(393)	(3,266)	(964)
Income from subsidiaries
Income (loss) before income taxes	12,128	10,730	15,369	40,081
Income tax provision	2,802	2,914	3,246	10,549
Net income (loss)	9,326	7,816	12,123	29,532
Other Comprehensive Income (Loss), Net of Tax
Comprehensive Income (loss), Net of Tax, Attributable to Parent	9,326	7,816	12,123	29,532
Eliminations [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues	(47,983)	(45,752)	(89,961)	(90,527)
Cost of revenues	(22,860)	(17,989)	(41,076)	(33,765)
Selling, general and administrative	(23,927)	(24,867)	(46,998)	(52,422)
Income (loss) from operations	(1,196)	(2,896)	(1,887)	(4,340)
Other [Abstract]
Income (loss) from unconsolidated entities
Other income - net	(5,074)	3,508	(4,413)	5,641
Intercompany interest income	(32,206)	(34,701)	(71,374)	(70,854)
Interest Expense	32,475	34,089	71,674	69,553
Income from subsidiaries	(114,289)	(186,990)	(183,514)	(368,177)
Income (loss) before income taxes	(120,290)	(186,990)	(189,514)	(368,177)
Income tax provision	(30,527)	(49,773)	(40,034)	(96,904)
Net income (loss)	(89,763)	(137,217)	(149,480)	(271,273)
Other Comprehensive Income (Loss), Net of Tax
Comprehensive Income (loss), Net of Tax, Attributable to Parent	(89,763)	(137,217)	(149,480)	(271,273)
Home Building [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues	1,516,234	1,712,057	2,813,571	3,031,365
Cost of revenues	1,250,689	1,374,347	2,310,589	2,416,592
Home Building [Member] | Toll Brothers Inc. [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues
Cost of revenues
Home Building [Member] | Subsidiary Issuer [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues
Cost of revenues
Home Building [Member] | Guarantor Subsidiaries [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues	1,509,558	1,675,155	2,798,935	2,967,351
Cost of revenues	1,248,159	1,344,891	2,301,861	2,365,786
Home Building [Member] | Nonguarantor Subsidiaries [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues	6,676	36,902	14,636	64,014
Cost of revenues	5,284	29,616	11,286	50,965
Home Building [Member] | Eliminations [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues
Cost of revenues	(2,754)	(160)	(2,558)	(159)
Land [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues	32,838	4,037	66,932	47,910
Cost of revenues	26,418	2,921	58,700	37,174
Land [Member] | Toll Brothers Inc. [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues
Cost of revenues
Land [Member] | Subsidiary Issuer [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues
Cost of revenues
Land [Member] | Guarantor Subsidiaries [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues	26,168	15,460	43,964	30,793
Cost of revenues	14,274	3,841	26,132	7,979
Land [Member] | Nonguarantor Subsidiaries [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues	54,653	34,329	112,929	107,644
Cost of revenues	32,250	16,909	71,086	62,801
Land [Member] | Eliminations [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues	(47,983)	(45,752)	(89,961)	(90,527)
Cost of revenues	$ (20,106)	$ (17,829)	$ (38,518)	$ (33,606)